Die for forming neck-yoke plates



(No Model.)

I. C. PETERSON.

DIE PoR PORMING NECK YOKE PLATES.

No. 309,873. Patented Deo. 30, 1884.

wij/755s 2S y UNrrn` STATES INGVARD C. PETERSON, OF KENOSHA, VISCONSIN.'

SPECIFICATION forming Application filed May 3, 1884.

part of Letters Patent No. 309,873, dated December 30, 1884,

(No model.)

T 0 @Z rif/tom. t may concern.- v

Be it known that I, INGWARD C. IHrERsoN, of Kenosha, in the county of Kenosha, and in the State of Visconsin, have invented certain new and useful Improvements in Dies .for Forming Neck-Yoke Plates; and I do hereby declare that the following is a full, clear, and exact description thereof.

My invention relates to the construction of dies for forming neck-yoke plates; and it consists in certain peculiarities of construction, as will be more fully set forth hereinafter.

In the drawings, Figure l is a central longitudinal vertical section through both my dies with the plate in place ready to be formed into the required shape taken on the line w w of Fig. 2. Fig. 2 is a transverse vertical section through the saine parts,taken on the line .fr x of Fig. l,with all the parts in the same p0- sition as in that figure. Fig. 3 is a similar section to that shown in Fig.- 2, but taken after the dies have been brought together and theplate formed in proper shape. Fig. 4 is a view of one of the neck-yoke plates just as it is cut out of strap-iron before it has been shaped by the dies. Fig. 5 is a plan view of the finished plate. Fig. 6 is a cross-section of the finished plate on the line y y of Fig. 5, and Fig. 7 is a longitudinal section of the same on the line s of Fig. 5.

Heretofore, so far as k nown to me, neckyoke plates, after being cut out of strap-iron, have been heated, say, hal'fway, and the heatcd end hammered into the required rounded form on an anvil, and then the other end is similarly heated and hammered into shape. This is not only a slow and laborious process, but one that requires skill in getting the said plate into the proper shape, and it is very diflicult to make a ncatpiece of workmanship ofit.

rIhe object of my invention is to obviate all this, and to produce the finished plates neatly, quickly, and easily, and to form perfect plates with unskilled labor; and to this end I .construct two dies, the upper and lower marked A and B, respectively. The upper die, A, is here shown with a dovetail projection, A, on top to enable it to be slid lengthwise into the head of atrip-hammer, while thelower die, B, is similarly furnished with a like projection, B', on its under side to enable it to be slid to place in a grooved iron block, (l. The upper surface of the lower die, B, is rounded, as shown in section, and provided with two upward-projecting peaked or pointed pins, b b, and the rounded surface is everywhere onthe same horizontal line from end to end-that is, without any depressions or any projections save only thatitis slightly beveled off in a semicircular lincat each end b b, and that it has the two pins b b, already named. The upper die, A, is larger than the lower die, and overlaps it at both ends and sides, as shown, and its under side is formed with a hollowed-out portion, A2, adapted to-it over the rounded upper surface ofthe lower die, and the upper part of this hollow Agis formed into the shape of the top surface of the plate as finished that is, at each end the hollow is rounded or formed into the beveled semicircular portions c a', and between these ends two depressions, a a, are formed to receive the pins b b ot' the lower die.

D, Fig. 4, represents, as stated, one of the neck-yoke plates just as originally cut out of strap-iron, before bending` and forming, and

having the holes d d, (which lit over the de-l scribed pins I) b of the lower die,) designed to receive bolts when the plates are secured to a neck-yoke, and having beveled sides and rounded ends and flat bottom, as shown in said figure and in Fig. 2.

The operation ot' forming my finished plates is very simple, it being only necessary to heat one of the'plates shown in Fig. 4, and then put the same on the lower die, B, as shown in Fig. 2, and bring the upper die, A, down upon it, as shown in Fig. 3, when the completed plate, as shown in Fig. 5, is finished at one operation. In the original plate, Fig. 4, the ends are just as thick as the center of the plate, but by the operation ot' the dies these ends are beveled, as shown at cl', this being accomplished by the pressure of the rounded and beveled inner end surfaces, c', of the hollowedout part A? of the upper die, A, and at the same time by reason of the upper end surfaces of the lower die, Il, being slightly cut away, a-s at b b', under the beveled parts c a of the upper die. The said plates have slight downward-projecting ends dz under their bevels rl, as shown in the sectional view, Fig. 7,

ICO

forming au under-side cutting-edge at each end, which'is forced into the wood of the neckyoke when my plates are secured thereto by bolts through the holes d d in the ordinary manner.

My dies, as shown, are intended to be used withtrip-hammers; but it is obvious that their exterior surfaces may be modified in any way necessary to adapt them for -use with handmachines, 0r any devices for exerting force and pressure, without affecting the essence of my invention.

A great advantage accruing from the use of my dies is that the plates must necessarily be always formed true-that is, that the boltholes will always be in the center of the plates at the highest point of the bend-which does not always happen with plates hammered into shape by hand, and which formed a serious objection to such plates; and, again, by reason of the rounded upper surface of the lower die all hammer-scale falls down as the plate is formed, thus insuring that the said die shall always be perfectly clean and ready for use again as soon as one plate has been formed Aand removed therefrom,which is a great advantage over the old method of forming said plates by hand, when the anvil was constantly becoming foul from accumulating hammerscale.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. A set of dies for forming neck-yoke plates I from iiat pieces of strap-iron, consisting of a lower die with rounded upper surface slightly beveled and rounded at each end, and having upward-projecting pins to receive said plates, andan upper die hollowed out on its'under side and adapted to overlap the lower die, the said hollowed out portion having beveled semicircular rounded inner surfaces and depressions to receive the pins of the lower die, substantially as set forth.

2. The combination of thelower die, B, having rounded upper surface beveled and rounded o' at each end in a semicircular line at b b, and having upward-projecting pins b b, with the overlapping upper die, A, having a hollowed-out portion, A2, in its under side, with holes a a, and rounded semicircular beveled inner ends, a a', substantially as set forth.

In testimony that I claim the foregoing l have hereunto` set my hand at Milwaukee. in the county of Milwaukee, and State of YV iseonsin, in t`he presence of two witnesses.

INGXVARD (l. PETERSON.

Vitn esses:

H. G. UNDERWooD, H. J. FonsYaHE. 

